"We have been attracted by Slovenia's economic potential and the prospects the country is offering as an investment destination," Petraeus was quoted as saying in a press release circulated by PR agency Propiar.

KKR has significant investments in Central and Eastern Europe and is the majority owner of United Group, a telecoms company that owns Slovenian operator Telemach.

The company says Slovenia's main attraction is a mix of fast economic growth, acceleration of spending and declining unemployment.

KKR Global Institute is a branch of KKR helping to make investment decisions.